MMC SD fs boot partition config coding style and proper description

CONFIG_SYS_MMC_SD_FS_BOOT_PARTITION ought to be called
CONFIG_SYS_MMCSD_FS_BOOT_PARTITION to keep it consistent with other config
options such as: CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR.

In addition, it is not related to raw mode booting but to fs mode instead.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-by: Tom Rini <trini@ti.com>
diff --git a/README b/README
index 66770b6..f827546 100644
--- a/README
+++ b/README
@@ -3657,8 +3657,7 @@
 
 		CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
 		CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS,
-		CONFIG_SYS_MMC_SD_FS_BOOT_PARTITION
-		Address, size and partition on the MMC to load U-Boot from
+		Address and partition on the MMC to load U-Boot from
 		when the MMC is being used in raw mode.
 
 		CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR
@@ -3671,6 +3670,10 @@
 		parameters from when MMC is being used in raw mode
 		(for falcon mode)
 
+		CONFIG_SYS_MMCSD_FS_BOOT_PARTITION
+		Partition on the MMC to load U-Boot from when the MMC is being
+		used in fs mode
+
 		CONFIG_SPL_FAT_SUPPORT
 		Support for fs/fat/libfat.o in SPL binary